I see this issue after the latest update. Tried to start the launcher, had to force quit, started it again, had to force quit, started it again and nothing happened aside from the patch window just flashing real quick before disappearing. And then, on like the fifth try a download started and patched the launcher and it worked.
I guess the client right now is like an old car. Have to try several times before it starts!
Yeah, I can't even force quit. Only 1 out of ten times do I even get a launcher and that ONE time I was able to engage. Otherwise every time it fails to start I have to manually restart my computer because my computer wont shutdown with the app running.